THE CRUSTACEA 





I ,litiV,'lli-jrT — F" 



Flii. 73. 



Larval stages oiBalanns. a, late nauplius stage ; 6, metanauplius, just about to pass into 

 the C'ypris stage; A, anus; A', antenmile ; A", antenna; D, intestine; Dr, fronto-lateral 

 gland ; F'-F^i, the six thoracic appendages of the Cypris stage beneath the cuticle of tlie meta- 

 nauplius ; Ff, frontal lilament ; H, fronto-lateral horn ; i]df, mandible ; Mx, maxillula ; 0, 

 paired eye of Cypris stage ; 0', nauplius-eye ; 01 upper lip, turned forward in a. (From Claus'8 

 Textbook.) 



